Differences Between Lab-Scale and Large-Scale Production
of Emulsions and Solutions
Some lab-scale formulations meet all specifications but encounter issues during scale-up: Low-concentration products often maintain lab performance, medium/high-concentration formulations may exhibit increased viscosity, inadequate droplet size, phase separation, oil bleeding, or even complete emulsification failure.
Solutions:
1)Process Optimization:
1.Maintain mixing temperature at 20–40°C (prevents surfactant deactivation or ingredient precipitation).
2.Adjust shear duration (lab: 5–10 min; production varies by equipment).
3.For high-concentration products: reverse-phase process is preferred.
2)Production Management:
1.Standardize operating procedures.
2.Train workers on irreversible stability risks.
3.Ensure complete API dissolution and controlled aqueous-phase addition.
3)Equipment Specifications:
1.Use homogenizers with ~20 kW power, 3000 rpm, and adjustable speed.
2.Optimize shear head design for efficiency.